Metal cutting tool



Jan. 9, 1940. SOLOMON 2,186,738

METAL CUTTING TOOL Filed June 14, 1938 2 SheetsSheet l Jan. 9,1940. E. SOLOMON 2,186,738-

METAL CUTTING TOOL Filed June 14, 1958 2 Sheets-Sheet 2 Patented Jan. 9, 1940 1 UNITED STATES PATENT OFFICE,

METAL CUTTING TOOL Evan L. Solomon, Detroit, Mich. Application June 14, 1938, SerialNo. 213,668 3 Claims. (01. 30-241 supplied to the tool by an air hammer; the upper .part of the tool being peculiarly constructed for easilyreceiving a portion of the air hammer, for operation.

-A still further. object of the invention is the construction. of a, barrel or casing upon which is adjustably mounted a novel foot device, and means is furnished for locking the foot device in anadjusted position upon the casing.

. With the foregoing and other objects in view,

? my invention comprises certain novel constructionsgcombinations, and arrangements of parts as will be; hereinafter fully described, illustrated in the accompanying drawings, and'more particularly pointed: out in the appended claims. 1

'In the drawings:

Figure 1 is an elevated front View of the tool constructed in, accordance with the present in-.

vention, while Figure 2 is a side View of the same. 80 Figure 3 is atop plan view.

Figure 4 is a sectional view taken on line 4-4, Figure 2, and looking in the direction of the arrows. Figure 5 is a sectional View taken on line 5-5,

36 Figure 1, and looking in the direction of the arrows.

Figure 6 is a sectional view taken on line 6-6, Figure 5, andlooking in the direction of the arrows.

Figure '7 is a sectional view taken on line l-'l, Figure 5, and looking in the direction of the arrows.

Figure 8 is a bottom plan view of the foot device;

Figure 9 is a perspective view of the foot de- Figure 1'()- is a sectional view taken on line Illl0, Figure 5, and looking in the direction of 50 the arrows.

Referring to the drawings, in which I have shown the preferred embodiment of my invention, the barrel or casing l is provided with an I enlarged upper or outer end 2 and a reduced 55 lower or inner end 3; the exterior surface of the fixing of the tool on the air hammer.

. tool H.

end 3 is screw threaded for the purposeherel-n after described.

The'upper or outer end 2 isa receiving endfor a portion ofan air hammer (not shown) which extends into this end and engages the reciproeating piston 4'. An annular groove eis' formed. upon end 2, andin this, groove is positioned a clamping band 6, which band is provided on its ends with. parallel ears I; insaid ears is a bolt 8 provided withnut 9, whereby the tool can be tightened on an air hammer. The end 2 is pro vided with a plurality of longitudinallyextending slots It for allowing a slight contraction'for more efficiently accomplishing the tightening or af- The piston 41 extends entirely through casing I, and is provided on itsinner end with acutting In the large chamber 12 of casing. l' I place an annularrubber block .13.; this blockis against the inner end 'or rchamber l2 Fig "5).,

face of washer; I4 is an annular compressio-nplate or ring I 5;.this ring l5 is'integral wi-th piston 4, whereby when, the air hammer strikes the blow, the impact, acting on the rubber block l3, will completed the cutting action. The foot device (Fig. 9) I comprises an angular broad body l6, which is provided with an inclined side face IT in which are two screw sockets l8.

Extending inwardly from body l6- is an inclined interiorly-threaded sleeve I9. The body I6 is provided with an integral horizontal runner 20, and this runner is provided with an integral curved extension 2|. Extension 2| has a rearward, curved guiding shoulder 22. A bottom cutting die 23, dove-tail in shape, is positioned hori- Against the outer end; of" annular,- block It is a metal-plate or washer Ht. Engaging the outer cause the cutting tool to rebound 'afterit has zontally in the extension 2i, andby means of a suitable screw 24 this die is fixedly secured in place. The runner 20 is bevelled on its lower face as shown by dotted line 25, Fig; 5, to facilitate the movement of the tool during the operation thereof. The upper cutting tool II has its inner flat face (Fig. 10) registering with the inner edge of die 23 and the inner face of the curved extension 2|, as clearly shown, for accomplishing in an excellent manner the cutting function. An

whereby the tool guide is securely fastened in place. Extending from the inclined body2l is a flat arm 29 and this arm terminates at its outer end in a downwardly and inwardly extending finger 30; this finger 30 normally bears against the fiat inner edge of the cutting tool I l, as clear- 1y seen in Figure 10, whereby the cutting tool is kept from turning; it is retained always in the proper cutting position.

As it is obvious that the interiorly-threaded sleeve Hi can be screwed longitudinally of the reduced lower end 3, an adjustment of the foot device is thereby accurately obtained upon casing I, in the event the cutting tool H becomes dull and is consequently shortened by the grinding.

To secure the foot device in an adjusted position upon casing I, a locking-nut collar 3| is threaded on the lower extension 3 against the inner end of sleeve l9. By screwing collar 3| tightly against screw I9, the foot device is securely locked in its adjusted position. Therefore, I have shown a novel foot device, which is adjustably mounted upon a casing, together with means for locking the foot device in an adjusted position.

The tapering or wedge-shaped structure of the runner 20, emphasized by line in Fig. 5, facilitates forward movement of the tool by slightly pressing downward one edge of the metal being cut; in other words, this novel construction of my tool or foot device facilitates greatly the cutting action of the tool.

On the inner face of body l6 (Fig. 9) is a slightly overhanging segment 32, to provide metal clearance in making a right-hand circular cut.

It is to be noted that the lower or inner end of easing l is bored sufliciently to receive the piston rying the cutter II, and rebounds said cutter.

From extensive experience in actual practice, I have found that my tool is not only simple in operation, but is efiicientand durable.

While I have described the preferred embodiment of my invention and illustrated the same in the accompanying drawings, certain minor changes or alterations'may appear to one skilled in the art to which this invention relates during the extensive manufacture of the same and I, therefore, reserve the right to make such changes or alterations as shall fairly fall within the scope of the appended claims.

What I claim is:

1. In a metal cutting tool, the combination of a casing provided with a foot device, said foot device provided with a die, a tool guide engaging said foot device, means holding said tool guide on said foot device, said tool guide comprising an inclined body provided withan outwardly extending arm, said arm terminating in a downwardly and inwardly extending finger, an edge of said finger being in alignment with an edge of said die, and said casing provided with cutting means passing in its movement the registering edges of said finger and die.

2. In a metal cutting tool, the combination of a casing, a foot device provided with a sleeve and a runner on said casing, said runner provided with a die, a tool guide on said foot device and provided with a guiding finger between said sleeve and die, and a cutting unit on said casing and guided and retained against rotary movement by said guiding finger.

3. In a metal cutting tool, the combination of a casing, a foot device on said casing, said foot device comprising an angular body terminating at its upper end in a forwardly-extending, internally-threaded, integral sleeve, said angular body provided at its lower end with a horizontal runner, said runner provided with an outwardlyextending curved extension, said extension provided with a detachable die, said extension provided at its rear with a curved guiding shoulder, said angular body provided on its inner face with an overhanging segment, said body provided with an inclined. side face and with threaded sockets in said side face, a tool guide against said socketed side face, screws extending through said tool guide and into said threaded sockets, said tool guide provided with a finger extending under the lower end of said sleeve, and cutting means on said casing and cooperating with said die.

EVAN L. SOLOMON. 

